Single flow circuit heat exchange device for periodic positive and reverse directional pumping

ABSTRACT

The present invention discloses that the temperature distribution status between fluid and heat exchanger or full heat exchanger is improved by periodically changing the flow directions of the positive or reverse directional pumping fluid, wherein the positive or reverse directional pumping fluid is passed through the heat exchanger inside fluid pump, or through the heat exchanger being insertingly installed or coated with desiccant material, or the heat exchanger itself having concurrent moisture absorbing function thereby constituting the thermal energy reclaim and dehumidification effect of full heat exchange functions as well as reducing the disadvantages of impurity accumulations at fixed flow direction.

BACKGROUND OF THE INVENTION

(a) Field of the invention

The present invention improves the conventional applications for heat exchange device or full heat exchange device to have the heat exchange operating function of single flow circuit for periodic positive and reverse directional pumping thereby timely improving the temperature distribution between the fluid and the heat exchanger, and when the heat exchanger is further insertingly installed or coated with desiccant material, or the heat exchanger itself is the heat exchanger having concurrent moisture absorbing function, then it is through the single flow-circuit periodic positive and reverse directional pumping fluid for passing through the heat exchanger inside the fluid pump, or passing through the heat exchanger being insertingly installed or coated with desiccant material, and/or passing through the heat exchanger itself having concurrent moisture absorbing function to constituted the thermal energy reclaim and dehumidification effect of full heat exchange functions as well as to reduce the imperfections of dust accumulation production at fixed flow directions.

(b) Description of the Prior Art

FIG. 1 is a main structure block schematic view of the conventional single flow circuit flow pumping device in fixed flow direction being applied in the heat exchange device or full heat exchange device; as shown in FIG. 1, the fluid is pumped in the fluid port at the side of different temperature space and discharged out of the fluid port at another side of different temperature space by the fluid pumping device (120) usually in fixed flow direction, and as the fluid flow direction is fixed, the temperature difference distribution gradient inside the heat exchanger is unchanged; wherein FIG. 2 is the temperature distribution diagram of the conventional single flow directional pumping thermal fluid; in which the temperature difference between the heat exchanger and single flow pumping fluid is gradually approached along with the accumulated time thereby gradually reducing its functions;

If the heat exchanger (100) as shown in FIG. 1 is replaced by the full heat exchanger (111) having heat exchange and dehumidification functions, then humidity and temperature differences between the full heat exchanger and single flow directional pumping fluid is gradually approached thereby reducing its functions; such as that FIG. 3 is a schematic view showing structure principles of the heat exchanger in FIG. 1 being replaced to the full heat exchanger having heat exchange function and dehumidification function.

SUMMARY OF THE INVENTION

The present invention discloses that the conventional heat exchange device having pumping fluids at fixed flow directions is made to have the single flow-circuit heat exchange device for periodic positive and reverse directional pumping thereby obtaining the following advantages: 1) in heat exchange applications, the temperature difference distribution status between at lease one of i) internally installed heat exchange device, or ii) externally installed heat exchange device, or iii) the piping, and the fluid in heat absorption or heat release is changed by periodically positive and reverse pumping fluids in different flow directions, thereby promoting the heat exchange efficiency; 2) for full heat exchange applications of the heat exchanger (100) being insertingly installed or coated with desiccant material, or the heat exchanger itself being the full heat exchanger (200) having concurrent moisture absorbing function, or the flow circuit of the fluid being externally series connected with a full heat exchange device or a full heat exchange piping with both heat exchange and moisture absorbing functions, it is through the periodic positive and reverse directional pumping fluid to allow the temperature and humidity saturation degrees differences between fluid and desiccant material being insertingly installed or coated on the heat exchanger, or between the full heat exchanger having concurrent moisture absorbing function and fluid to be changed thereby promoting the dehumidification effect; 3) The impurities brought in by the fluid flow at previous flow direction are discharged by the single flow-circuit fluid of periodic positive and reverse directional pumping thereby reducing the disadvantages of impurity accumulations at fixed flow direction.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic view showing operating principles of the conventional heat exchange device or full heat exchange device.

FIG. 2 is the temperature distribution diagram of the conventional single flow directional pumping thermal fluid.

FIG. 3 is a schematic view showing structure principles of the heat exchanger in FIG. 1 being replaced to the full heat exchanger having heat exchange function and dehumidification function.

FIG. 4 is the first schematic view showing structure principles of the single flow circuit heat exchange device for periodic positive and reverse directional pumping of the present invention.

FIG. 5 is the temperature distribution variation diagram between thermal fluid and piping during the operation as shown in FIG. 4.

FIG. 6 is a schematic view showing structure principles of the heat exchanger in FIG. 4 being replaced to the full heat exchanger having heat exchange function and dehumidification function.

FIG. 7 is the second schematic view showing structure principles of the single flow circuit heat exchange device having the fluid bidirectional pumping device (123) being constituted by two unidirectional fluid pumps at different flow pumping directions.

FIG. 8 is the temperature distribution variation diagram between thermal fluid and piping during the operation as shown in FIG. 7.

FIG. 9 is a schematic view showing structure principles of the heat exchanger in FIG. 7 being replaced to the full heat exchanger having heat exchange function and dehumidification function.

DESCRIPTION OF MAIN COMPONENT SYMBOLS

-   100: Heat exchanger -   120: Fluid pumping device in fixed flow direction -   123: Bidirectional fluid pumping device -   111: Full heat exchanger -   250: Periodic fluid direction-change operative control device -   a, b: Fluid port

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

For the single flow circuit heat exchange device for periodic positive and reverse directional pumping of the present invention, the conventional heat exchange device or full heat exchange device is installed with the bidirectional fluid pumping device (123) for periodic positive and reverse directional pumping, and the periodic fluid direction-change operative control device (250) for operatively controlling the bidirectional fluid pumping device (123) so as to allow the fluid originally pumped in fixed flow direction appear periodically alternative flow directional change, wherein:

The bidirectional fluid pumping device (123): It is constituted by 1) the fluid pumping device capable of producing positive pressure to push fluid; 2) the fluid pumping device capable of producing negative pressure to attract fluid; or 3) the fluid pumping device having both functions of producing positive pressure to push fluid and negative pressure to attract fluid for pumping gaseous or liquid state fluids, wherein the fluid pump is driven by electric motor, engine power, or mechanical or electric power converted from other wind power, thermal energy, temperature-difference energy, or solar energy, etc;

According to above said definitions on operating functions, the selectable embodiments of said bidirectional fluid pumping device (123) include the following:

1. It is by adopting at least one bidirectional pumping fluid pump to suck and discharge the fluid, wherein flow direction of the fluid is periodically changed by periodically operating the pump in positive or reverse direction; or

2. It is constituted by at least two unidirectional fluid pumps of different pumping directions in series connection to constitute bidirectional fluid pumping device (123) for periodically alternatively pumping to periodically exchange the fluid flow direction; or

3. It is constituted by two unidirectional fluid pumps of different pumping directions in parallel connection for periodic alternatively pumping to periodically exchange the fluid flow directions, wherein if the pumps has no static anti-reverse flow characteristics, they can be respectively series connected with an unidirectional valve to avoid reverse flow; therefore the two pumps of different pumping directions are alternatively pumped to periodically exchange the fluid flow directions; or

4. It is constituted by at least one unidirectional fluid pump and four controllable switch type fluid valves in bridge type combination, wherein the fluid flow direction is periodically changed by alternatively operatively control two fluid valves to open and the other two fluid valves to close;

The periodic fluid direction-change operative control device (250): It is constituted by electromechanical components, solid state electronic components, or microprocessors and relevant software and operative control interfaces to operatively control the bidirectional fluid pumping device (123) for periodically changing the flow direction of the fluid passing through heat exchange device or full heat exchange device thereby operatively controlling the temperature difference distribution status between fluid and heat exchanger;

The timing for fluid periodic flow direction change can be 1) the open loop type operative control by presetting the direction-change period of fluid flow; or 2) the closed loop type operative control by detecting the temperature difference between fluid and heat exchanger at setting locations for periodic closed loop fluid flow direction change timing operative control; or 3) randomly manual change.

FIG. 4 is the first schematic view showing structure principles of the single flow circuit heat exchange device for periodic positive and reverse directional pumping of the present invention, wherein the fluid in the heat exchange device or full heat exchange device is operated for periodic pumping directional change, such as that as shown in FIG. 4 for the example of the heat exchange device for indoor-outdoor air change in cold winter times, wherein the indoor higher temperature air flow is pumped to heat exchange device via fluid port (a) and is discharged to outdoors via fluid port (b) of heat exchanger by the bidirectional pumping device (123), the heat exchanger of the heat exchange device is then gradually formed with a temperature distribution from high temperature at fluid port (a) to the lower temperature at fluid port (b), and the pumping direction of the bidirectional pumping device (123) is further operatively controlled manually or by the periodic fluid direction-change operative control device (250) to pump the fluid in reverse direction, wherein the fluid of outdoor lower temperature fresh air is pumped to the heat exchange device via fluid port (b) and is charged to indoors via fluid port (a), and the heat exchanger of the heat exchange device is then gradually formed with a temperature distribution from lower temperature at fluid port (b) to the higher temperature at fluid port (a), so that temperature distribution status on the heat exchanger is changed by the periodic positive and reverse directional pumping fluid; FIG. 5 is the temperature distribution variation diagram between thermal fluid and piping during the operation as shown in FIG. 4.

Said periodic positive and reverse directional pumping fluid function being applied for the full heat exchange device having heat exchanger being insertingly installed or coated with desiccant material, or the heat exchanger being full heat exchanger itself having concurrent moisture absorbing function is through the fluid having two different flow directions to pass through the full heat exchanger inside heat exchange device to change the distribution status of the temperature and humidity saturation degree differences between the fluid and full heat exchanger along with the flow direction of the fluid; FIG. 6 is a schematic view showing structure principles of the heat exchanger in FIG. 4 being replaced to the full heat exchanger having heat exchange function and dehumidification function.

Further, the bidirectional pumping device (123) of the single flow circuit heat exchange device for periodic positive and reverse directional pumping can be selected to be constituted by two unidirectional fluid pumps having different pumping direction in series connection to constitute the function of fluid bidirectional pumping device (123);

FIG. 7 is the second schematic view showing structure principles of the single flow circuit heat exchange device having the fluid bidirectional pumping device (123) being constituted by two unidirectional fluid pumps at different flow pumping directions, wherein the fluid inside the heat exchanger inside heat exchange device or full heat exchange device is operatively controlled for periodically alternative pumping directional change, such as that as shown in FIG. 7 for the example of the heat exchange device for indoor-outdoor air change in cold winter times, wherein the indoor higher temperature air flow is pumped to heat exchange device via fluid port (a) and is discharged to outdoors via fluid port (b) by the bidirectional pumping device (123), the heat exchanger of the heat exchange device is then gradually formed with a temperature distribution from high temperature at fluid port (a) to the lower temperature at fluid port (b), and the pumping direction of the bidirectional pumping device (123) is further operatively controlled manually or by the periodic fluid direction-change operative control device (250) to pump the fluid in reverse direction, wherein the fluid of outdoor lower temperature fresh air is pumped to the heat exchange device via fluid port (b) and is charged to indoors via fluid port (a), and the heat exchanger of the heat exchange device is then gradually formed with a temperature distribution from lower temperature at fluid port (b) to the higher temperature at fluid port (a), so that temperature distribution status on the heat exchanger is changed by the periodic positive and reverse directional pumping fluid; FIG. 8 is the temperature distribution variation diagram between thermal fluid and piping during the operation as shown in FIG. 7, wherein the temperature distribution status is similar to the one shown in FIG. 5.

Said periodic positive and reverse directional pumping fluid function being applied for the full heat exchange device having the heat exchanger being insertingly installed or coated with desiccant material, or the heat exchanger being full heat exchanger itself having concurrent moisture absorbing function is through the fluid having two different flow directions to pass through the full heat exchanger inside heat exchange device to change the distribution status of the temperature and humidity saturation degree differences between the fluid and full heat exchanger along with the flow direction of the fluid; FIG. 9 is a schematic view showing structure principles of the heat exchanger in FIG. 7 being replaced to the full heat exchanger having heat exchange function and dehumidification function.

The heat exchanger or full heat exchanger of the single flow circuit heat exchange device for periodic positive and reverse directional pumping is embodied to have the following characteristics: 1) it is of the tubular structure in linear or other geometric shapes; 2) it is constituted by the multi-layer structure having fluid path for passing gaseous or liquid state fluids; or 3) it is constituted by one or more than one fluid path in series connection, parallel connection or series and parallel connection. 

1. A single flow circuit heat exchange device for periodic positive and reverse directional pumping which is installed with the bidirectional fluid pumping device (123) for periodic positive and reverse directional pumping, and the periodic fluid direction-change operative control device (250) for operatively controlling the bidirectional fluid pumping device (123) to the heat exchange device or full heat exchange device so as to allow the fluid originally pumped in fixed flow direction appear periodically alternative flow directional change, wherein: The bidirectional fluid pumping device (123): It is constituted by 1) the fluid pumping device capable of producing positive pressure to push fluid; 2) the fluid pumping device capable of producing negative pressure to attract fluid; or 3) the fluid pumping device having both functions of producing positive pressure to push fluid and negative pressure to attract fluid for pumping gaseous or liquid state fluids, wherein the fluid pump is driven by electric motor, engine power, or mechanical or electric power converted from other wind power, thermal energy, temperature-difference energy, or solar energy, etc; According to above said definitions on operating functions, the selectable embodiments of said bidirectional fluid pumping device (123) include the following: 1) It is by adopting at least one bidirectional pumping fluid pump to suck and discharge the fluid, wherein flow direction of the fluid is periodically changed by periodically operating the pump in positive or reverse direction; or 2) It is constituted by at least two unidirectional fluid pumps of different pumping directions in series connection to constitute bidirectional fluid pumping device (123) for periodically alternatively pumping to periodically exchange the fluid flow direction; or 3) It is constituted by two unidirectional fluid pumps of different pumping directions in parallel connection for periodic alternatively pumping to periodically exchange the fluid flow directions, wherein if the pumps has no static anti-reverse flow characteristics, they can be respectively series connected with an unidirectional valve to avoid reverse flow; therefore the two pumps of different pumping directions are alternatively pumped to periodically exchange the fluid flow directions; or 4) It is constituted by at least one unidirectional fluid pump and four controllable switch type fluid valves in bridge type combination, wherein the fluid flow direction is periodically changed by alternatively operatively control two fluid valves to open and the other two fluid valves to close; The periodic fluid direction-change operative control device (250): It is constituted by electromechanical components, solid state electronic components, or microprocessors and relevant software and operative control interfaces to operatively control the bidirectional fluid pumping device (123) for periodically changing the flow direction of the fluid passing through heat exchange device or full heat exchange device thereby operatively controlling the temperature difference distribution status between fluid and heat exchanger; The timing for fluid periodic flow direction change can be 1) the open loop type operative control by presetting the direction-change period of fluid flow; or 2) the closed loop type operative control by detecting the temperature difference between fluid and heat exchanger at setting locations for periodic closed loop fluid flow direction change timing operative control; or 3) randomly manual change.
 2. A single flow circuit heat exchange device for periodic positive and reverse directional pumping, wherein the embodied constitution types of heat exchanger or full heat exchanger include being the tubular structure in linear or other geometric shapes.
 3. A single flow circuit heat exchange device for periodic positive and reverse directional pumping, wherein the embodied constitution types of heat exchanger or full heat exchanger include being constituted by the multi-layer structure having fluid path for passing gaseous or liquid state fluids.
 4. A single flow circuit heat exchange device for periodic positive and reverse directional pumping, wherein the embodied constitution types of heat exchanger or full heat exchanger include being constituted by one or more than one fluid path in series connection, parallel connection or series and parallel connection. 